Mazda 2013 CX-9, Owner'S Manual

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The acceptable range for signals (infrared rays) from the Rear Entertainment System is as
follows:
Rear Entertainment System
Wireless headphone signal
(infrared rays) transmitter
The signals (infrared rays) can be received in
any location on the rear seats. However, the
rear of the transmitter is out of the acceptable
range.
A wireless headphone can be used in any position on the rear seats, however, the sound
may skip under the following conditions because the acceptable range varies or the signals
are blocked.
l
When affected by intense light such as direct sunshine.
l
When the wireless headphone receiver does not point to the Rear Entertainment System
transmitter.
l
When the signal is blocked by an obstruction such as the seat.
6-84
Interior Comfort
Rear Entertainment System